Staple



UNITED STATES PATENT OFFICE.

CURTIS E. BEAINAED, or JOLIET, ILLInoIs.

STAPLE.

SPECIFICATION forming part of Letters Patent No. 300,204, dated June 10,1884.

Application filed February 15, 1884. (No model.)

To all whom it may concern:

Be it known that I, CURTIsl B. BRAINARD, a citizen of the United Statesof America, residing at Joliet, inthe county of Will and State ofIllinois, have invented certain new and useful Improvements in Staples,of which the following is a specification, reference being had thereinto the accompanying drawmeans for re'enforcing or strengthening the headof the staple at the place where the blow is struck in driving it byleaving additional metal on the head thicker in the center than ateither end, diamond-shaped in form, and having said re-enforcing metalextend downward on the sides and rnnout in a point.

Referring to the drawings, Fig. l shows a perspective view of thestaple, P P being its prods or legs, and R the additional 11e-enforcingpart of the head. The staple is formed by shearing it off diagonallyfrom the end of a metal strip rolled in form as shown in crosssection inFig. 4. Fig. 3 shows the angle at which the staple is so sheared or cutoff,'and Fig. 2 shows how or in what manner it is so sheared off, thelegs or prods being out off first and bent downward in the proper forni,

and the headcnt loose last, which is done by properly-shaped punches anddies. In order to furnish the staple with the additional diamond-shapedre-enforcing head R, the strip S is rolled so as to leave the centralrib, R, elevated above the contour of the strip, as shown incross-section in Fig. 4. This rib when cut across diagonally, as shownin Fig. 3, will leave a diamondshaped elevation or head irnmediately onthe head of the staple, as shown in Figs. l and 2. This additional headR receives the blow vwhen the staple is driven, and, being integral withit, renders it strong and not liable to break at that point. By sevening the staple from the strip in a` diagonal manner the points areformed on the ends of 5o the prods or legs, but beveled in oppositedirections, so that when the staple is driven the legs will spread, andthus lock the staple in the wood.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is as follows, to wit:

The staple described, .having its head re-enforced andstrengthened bymeans of the integral additional metal R, formed of a portion of the ribR of the strip S by means of shearing the staple from the diagonal endof said strip, and having its points beveled in opposite directions, asand for the purpose set forth.

CURTIS B. BRAINARD.

XVitIIesses RUEUsJ. DELANO, JosEPII L. HEME.

